Pliers for removing small screws and the like

Abstract

Pliers for advantageously removing small screws are provided. The pliers have a pair of upper and lower arms which are pivotally supported by a shaft. Front end tips of the upper and lower arms are respectively provided with upper and lower recessed engagement parts between right and left edges, and the engagement parts vertically face each other. The upper and lower engagement parts are inclined in a manner such that they gradually become separated vertically from each other toward the rear when the jaws are closed. An inner bottom included in each of engagement parts is provided with plural projected and depressed streams extending in a back and forth direction.

1. Pliers, comprising:
 a pair of upper and lower arms that are pivotally supported by a shaft;  
 wherein front end tips of jaws respectively included in said arms are provided with upper and lower recessed engagement parts between right and left edges, and said engagement parts vertically face each other;  
 wherein each of said upper and lower engagement parts makes a trapeziform shape that comprises an inner bottom, and right and left sidewalls which are inclined in a manner such that a space between said sidewalls becomes wider outward; and  
 wherein said inner bottoms of said upper and lower engagement parts are inclined in a manner such that the engagement parts gradually become separated vertically from each other toward a rear when the jaws are closed.  
 
   
   
     2. The pliers according to  claim 1 , said inner bottom of each of engagement parts is provided with plural projected and depressed streams extending in a back and forth direction. 
   
   
     3. The pliers according to  claim 2 , wherein three projected streams each having a sharply pointed edge are formed on each of said inner bottoms which are substantially flat. 
   
   
     4. The pliers according to  claim 2 , wherein the right and left edges of one of said engagement parts and those of another engagement part are respectively butt-contacted with each other by tips thereof. 
   
   
     5. The pliers according to  claim 3 , wherein the right and left edges of one of said engagement parts and those of another engagement part are respectively butt-contacted with each other by tips thereof. 
   
   
     6. The pliers according to  claim 1 , wherein the right and left edges of said upper and lower engagement parts respectively comprise facing serrate surfaces which include plural projected and depressed streams extending in right and left between the front and the rear.